deregulation s effect on power quality monitoring

... Effects of Power Quality Problems Power Quality Problem-Solving Procedures Power Quality Solutions Summary References Chapter Power Quality Standards Power Quality Standards Organizations Institute ... x Contents Deregulation s Effect on Power Quality Monitoring Power Quality Monitoring System Monitoring and Analysis to Evaluate Compliance Monitoring to Characterize System Performance Monitoring ... (transmit electricity on someone else s power system) on their transmission and distribution systems The GENCOs will expect reliable and high -power- quality T&D systems A reliable and high -power- quality...

Ngày tải lên: 14/08/2014, 12:31

... networks, namely, power generation, transmission, distribution and end user stages The book is divided into three sections: Power Quality Issues and Standards in Electricity Networks; Power Quality ... the transmission and distribution system become more sensitive to power quality variation than those used in the past Many new devices contain microprocessor based controls and electronics power ... Improvement in Transmission and Distribution Systems Chapter Impact of Series FACTS Devices (GCSC, TCSC and TCSR) on Distance Protection Setting Zones in 400 kV Transmission Line Mohamed Zellagui...

Ngày tải lên: 17/03/2014, 02:20

... System (FACTS) controllers have been used in transmission and distribution systems to deal with power quality issues Chapter VIII Preface identifies the limitations in the transmission systems, i.e., ... three sections: Power Quality Issues and Standards in Electricity Networks; Power Quality Improvements in Transmission and Distribution Systems; and Power Quality Improvement in End Users Stage A ... Improvement in Transmission and Distribution Systems Chapter Impact of Series FACTS Devices (GCSC, TCSC and TCSR) on Distance Protection Setting Zones in 400 kV Transmission Line Mohamed Zellagui...

Ngày tải lên: 23/03/2014, 15:20

... values of unsafe work conditions Conclusions The capacitive coupling models lead to an accurate approximation to the response of distribution network against the frequency spectrum imposed by ... 77.8  while simplified models does not detect a resonant frequency for this wind farm configuration, as shown in Fig 11 272 Power Quality Harmonics Analysis and Real Measurements Data 0.050 ... this waveform is shown It is observed that the harmonics components near the switching frequency are considerably higher than the fundamental component Harmonics components 70 (3500 Hz) is 575%...

Ngày tải lên: 18/06/2014, 22:20

... products based on electronic components in enterprises, institutions, shops, small businesses, residences, etc and transport systems has been welcomed by the people who already use it due to its increased ... etc While the established sources of harmonics are still present on the system, the power network is also subjected to new harmonic sources: Energy conservation measures, such as those for improved ... speed controls for traction High-voltage direct-current power conversion and transmission Interconnection of wind and solar power converters with distribution systems Static var compensators which...

Ngày tải lên: 19/06/2014, 08:20

... constant state transition and measurement matrices However, it assumes a stationary reference Thus, the in-phase and quadrature phase components represent the instantaneous values of con-sinusoidal ... switching on- off of power electronic equipments (devices) used in electric derives and power system transmission (AC/DC transmission), the situation is different, where the harmonic magnitudes are ... Electric Power Systems Harmonics - Identification and Measurements 11 It is clear that this set of equations is similar to the set of equations given by equation (5) Thus an equation similar to...

Ngày tải lên: 19/06/2014, 08:20

... time steps at various window sizes Fig 36 Fundamental powers against time steps 38 Power Quality Harmonics Analysis and Real Measurements Data Fig 37 Fourth harmonic power in the three phases against ... first Subsection we compare the results obtained using the simulated data set of Section 2, and in the second Subsection the actual recorded data set is used Simulated data The simulated data set ... Section 4.3 has been used in this Section, where we assume (randomly) that the data set is contaminated with gross error, we change the sign for some measurements or we put these measurements...

Ngày tải lên: 19/06/2014, 08:20

... Group on Power System Harmonics, Power System Harmonics: An Overview,” IEEE Trans on Power Apparatus and Systems, Vol PAS-102, No 8, pp 2455-2460, August 1983 Electric Power Systems Harmonics - ... Deterministic/Stochastic Framework for Power System Harmonics Modeling”, IEEE Transaction on Power Systems, Vol.114, 1996 S Osowski, “Neural Network for Estimation of Harmonic Components in a Power System”, ... measurement of harmonic components in a power system, Electric Power System Research 50 (1999) 99-105 L.A Zadeh, Fuzzy sets as a basis for theory of possibility, Fussy Sets and Systems, Vol 1, pp 3-28,...

Ngày tải lên: 19/06/2014, 08:20

... Interharmonics in Power Systems 88 Power Quality Harmonics Analysis and Real Measurements Data Johnson, R A & Wichern, D W (2007) Applied Multivariate Statistical Analysis, Sixth edition, Pearson Prentice ... Data for Assessing Power Quality Disturbances, Proceedings of the IEEE PES General Meeting Nassif, A B., Yong, J., Xu, W (2010b) Interharmonics: Signaling processing issues and applications, Proceedings ... 80 Power Quality Harmonics Analysis and Real Measurements Data Interharmonic source determination case study #1 The case study presented in this section illustrates the worst known effect of...

Ngày tải lên: 19/06/2014, 08:20

... voltage transfer ratio and voltage phase shift characteristics have been measured to reveal measurement accuracy problems of power quality assessment in MV systems Magnitudes versus phase transfer characteristic ... transmission lines in particular power system Secondary rated voltage levels usually used in a typical measuring and protection systems are: 100 V, 100/3 V, 100/3 V what results with transformation ... restrictions and limited accuracy of the developed circuit model it can be successfully used for approximate assessment of VT pass band Voltage Harmonics Measuring Issues in Medium Voltage Systems...

Ngày tải lên: 19/06/2014, 08:20

... 122 Power Quality Harmonics Analysis and Real Measurements Data Output characteristics and boundary curves On the basis of the analysis results, equations for the output characteristics are ... When it „misses“, all the semiconductor switches stop conducting and the converter just stops working This is one of the big advantages of the resonant converters working at frequencies higher ... Harmonics Analysis and Real Measurements Data S and С0, the smaller this area is However, the increase of the snubber capacitors leads to a decrease in the commutation losses in the transistors...

Ngày tải lên: 19/06/2014, 08:20

... 62-68, ISSN 0861-4717 Cheron, Y., Foch, H & Salesses, J (1985) Study of resonant converter using power transistors in a 25-kW X-Rays tube power supply IEEE Power Electronics Specialists Conference, ... Increasing triangle pulse series input power A series of increasing triangle pulses is shown in Fig and the equation which describes this series is given in (7) Fig Increasing triangle pulse series ... 136 Power Quality Harmonics Analysis and Real Measurements Data 2.4 Triangle pulse series input power A series of triangle input power is shown in Fig The equation which describes this kind of series...

Ngày tải lên: 19/06/2014, 08:20

... transmission lines and causes harmonic voltage exert on the loads in other place(Terciyanli et al 2011) As a result, the loss of power transmission is increased and the safety of power grid is seriously ... load and power is distributed to many nonlinear loads in many difference places along the transmission line The transmission of harmonic current causes harmonic voltage in transmission lines which ... transmission lines and as a result power transmission loss is increased and power grid has to take a risk of higher temperature which threatens the safety of power grid Harmonic current in transformers...

Ngày tải lên: 19/06/2014, 08:20

... 3.2 Study of the series resonance This Section studies the harmonic response of the system “observed” from the utility supply system It implies analyzing the passive set formed by the supply system ... inductor resistance is considered 188 Power Quality Harmonics Analysis and Real Measurements Data in the analytical location of the resonances, making a contribution to previous studies This resistance, ... parameters to study resonances under power system operating conditions Thus, the power system harmonic response is analyzed for the following variable ranges: Harmonic: k = (1, , 15) • Single-phase...

Ngày tải lên: 19/06/2014, 08:20

... Transmission systems Transmission systems include power cables and wires Transmitters are the conductors which are used in power system Because of the skin effect (Hightech), the resistance of conductors ... power system KPI on both substation and consumer sides We also discuss how the switch mode devices may affect the devices on each side Section presents our approach for simulating the power system ... kres = kp, meas b) kres = ks, meas 6.2 Harmonic resonance location in several power systems This section briefly describes several works in the literature on the Steinmetz circuit in power systems,...

Ngày tải lên: 19/06/2014, 08:20

... Personal computers impacts on power quality are noticeable due to the common place usage of switched mode power supplies (SMPS) for supplying processing electronics Such power supplies are responsible ... which is very costly[13] 214 Power Quality Harmonics Analysis and Real Measurements Data Brief steel plant system description The steel plant system consists of 49 buses and 38 two winding transformers ... using large scale studies [25-28] Study proceedures and results 8.1 Introduction The University consists consists of 60 buildings including students housing Almost each student at the university...

Ngày tải lên: 19/06/2014, 08:20

... these computers on the line current harmonics The following conclusions can be drawn from the results of this study The switch mode power supply (SMPS) used in personal computers draws a non ... is rush in harmonics currents A high density of (SMPS) loads results in over loading of the neutral conductor and the overheating of the distribution transformers The assessment of odd harmonics ... periodic system studies especially when new equipments are added to the plant Also power quality measurements will be necessary to double check harmonics order found through simulation Harmonics Effect...

Ngày tải lên: 19/06/2014, 08:20

... total conversion losses of a real MW PV installation have been studied considering reflection losses, low radiation and shadow losses, temperature losses, auxiliary losses, array losses and converters ... Compensators in Power Systems Under Asymmetrical and Nonsinusoidal Conditions, IEEE 260 Power Quality Harmonics Analysis and Real Measurements Data Transactions on Power Delivery, Vol 23, Issue ... Harmonics Filtering Using Measurement of Some Electrical Items in Electrical Installation on UHP EAF, WSEAS Transactions on Circuit and Systems, Vol 7, Issue 1, (january 2008), pp 22-31, ISSN...

Ngày tải lên: 19/06/2014, 08:20

... analysis consists of four steps, namely, detection, classification, characterization, and location Power quality monitoring is used to detect the power quality problems The monitoring solutions ... clearing time is rather small 5 Power Quality Monitoring Thus, fast protection and fast circuit breakers are essential Also, transmission and subtransmission systems are normally operated as a grid, ... disturbances in transmission and distribution system are presented in the second section Brief discussion of each chapter is as follows Chapter presents the monitoring of voltage sags to find its origin...

Ngày tải lên: 19/06/2014, 11:20

... classification process By comparing the classification results and processing time from two systems discussed in this work, it was possible to demonstrate the validity of the PCA technique, which was able ... G (2005) Voltage Dip (Sag) Estimation in Power Systems based on Stochastic Assessment and Optimal Monitoring, Ph.D Thesis, Chalmers University of Technology, Göteborg, Sweden Olguin, G.; Bollen, ... frequency contexts The wavelet transform is particularly effective in representing various aspects of non-stationary signals such as trends, discontinuities and repeated patterns, in which other signal...

Ngày tải lên: 19/06/2014, 11:20